|Nation|1986|1989|1991|1997|1999|2000|2003|2005|2007|2009|2011|Years|
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|Argentina|4th|-|4th|4th|3rd|4th|2nd|2nd|2nd|1st|2nd|10|
|Brazil|3rd|3rd|3rd|1st|1st|1st|1st|1st|1st|2nd|1st|11|
|Canada|2nd|1st|2nd|2nd|-|-|5th|4th|6th|-|-|7|
|Chile|-|-|-|-|-|-|-|-|-|3rd|5th|2|
|Colombia|-|-|-|-|6th|6th|-|-|-|-|-|2|
|Costa Rica|-|-|-|5th|-|-|-|-|-|-|-|1|
|Cuba|-|-|-|-|2nd|-|-|-|-|-|3rd|2|
|Dominican Republic|-|-|-|-|-|-|6th|5th|3rd|4th|6th|5|
|Greenland|-|-|-|-|5th|3rd|-|-|-|-|-|2|
|Guatemala|-|-|-|-|-|-|7th|-|-|-|-|1|
|Mexico|-|4th|-|6th|-|5th|-|-|8th|5th|7th|6|
|Paraguay|-|-|6th|-|-|-|-|-|4th|7th|-|3|
|Puerto Rico|-|-|7th|-|-|-|-|-|-|-|-|1|
|Uruguay|-|-|5th|3rd|4th|2nd|3rd|3rd|5th|6th|4th|9|
|United States|1st|2nd|1st|-|-|-|4th|6th|7th|-|-|6|
|Venezuela|-|-|-|-|-|-|-|-|-|-|8th|1|

Question: what is the number of nations that placed more than five different years?
Answer: 6